Ko-shogatsu is the 15th day of New Year or three days from the 14th to the 16th of January. The days from New Year’s Day to the 15th are called Matsu-no-uchi, and New Year’s decorations and Kado-matsu are placed until Ko-shogatsu or the evening of the previous day. However, these days, New Year’s decorations and Kado-matsu are usually taken away on January 7th or 8th.